// 文字大小颜色
@mixin font-style ($font-size, $font-color, $font-weight) {
    font-size: $font-size;
    color: $font-color;
    font-weight: $font-weight;
}

// 定位
@mixin absolute-position ($left, $top, $margin-left, $margin-top) {
    position: absolute;
    top: $top;
    left: $left;
    margin-left: $margin-left;
    margin-top: $margin-top;
}